Teuchos_as.hpp File Reference

Definition of Teuchos::as, for conversions between types. More...

#include "Teuchos_ConfigDefs.hpp"
#include "Teuchos_Assert.hpp"
#include <limits>
#include <cstdlib>
#include <cerrno>
#include <climits>

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Classes
class	Teuchos::ValueTypeConversionTraits< TypeTo, TypeFrom >
	Default traits class for all conversions between value types. More...
class	Teuchos::asFunc< TypeTo >
	Function object wrapper for as(). More...
class	Teuchos::ValueTypeConversionTraits< OutType, std::string >
	Convert an std::string to a type OutType. More...
class	Teuchos::ValueTypeConversionTraits< double, std::string >
	Convert an std::string to a double. More...
class	Teuchos::ValueTypeConversionTraits< float, std::string >
	Convert an std::string to a float. More...
class	Teuchos::ValueTypeConversionTraits< long double, std::string >
	Convert an std::string to a long double. More...
class	Teuchos::ValueTypeConversionTraits< long long, std::string >
	Convert an std::string to a long long. More...
class	Teuchos::ValueTypeConversionTraits< unsigned long long, std::string >
	Convert an std::string to an unsigned long long. More...
class	Teuchos::ValueTypeConversionTraits< long, std::string >
	Convert an std::string to a long. More...
class	Teuchos::ValueTypeConversionTraits< unsigned long, std::string >
	Convert an std::string to an unsigned long. More...
class	Teuchos::ValueTypeConversionTraits< int, std::string >
	Convert an std::string to an int. More...
class	Teuchos::ValueTypeConversionTraits< unsigned int, std::string >
	Convert an std::string to an unsigned int. More...
class	Teuchos::ValueTypeConversionTraits< short, std::string >
	Convert an std::string to a short. More...
class	Teuchos::ValueTypeConversionTraits< unsigned short, std::string >
	Convert an std::string to an unsigned short. More...
class	Teuchos::ValueTypeConversionTraits< float, double >
	Convert from double to float. More...
class	Teuchos::ValueTypeConversionTraits< float, long double >
	Convert from long double to float. More...
class	Teuchos::ValueTypeConversionTraits< double, long double >
	Convert from long double to double. More...
class	Teuchos::ValueTypeConversionTraits< short, double >
	Convert from double to short. More...
class	Teuchos::ValueTypeConversionTraits< unsigned short, double >
	Convert from double to unsigned short. More...
class	Teuchos::ValueTypeConversionTraits< int, double >
	Convert from double to int. More...
class	Teuchos::ValueTypeConversionTraits< unsigned int, double >
	Convert from double to unsigned int. More...
class	Teuchos::ValueTypeConversionTraits< long, double >
	Convert from double to long. More...
class	Teuchos::ValueTypeConversionTraits< unsigned long, double >
	Convert from double to unsigned long. More...
class	Teuchos::ValueTypeConversionTraits< long long, double >
	Convert from double to long long. More...
class	Teuchos::ValueTypeConversionTraits< unsigned long long, double >
	Convert from double to unsigned long long. More...
class	Teuchos::ValueTypeConversionTraits< short, float >
	Convert from float to short. More...
class	Teuchos::ValueTypeConversionTraits< unsigned short, float >
	Convert from float to unsigned short. More...
class	Teuchos::ValueTypeConversionTraits< int, float >
	Convert from float to int. More...
class	Teuchos::ValueTypeConversionTraits< unsigned int, float >
	Convert from float to unsigned int. More...
class	Teuchos::ValueTypeConversionTraits< long, float >
	Convert from float to long. More...
class	Teuchos::ValueTypeConversionTraits< unsigned long, float >
	Convert from float to unsigned long. More...
class	Teuchos::ValueTypeConversionTraits< long long, float >
	Convert from float to long long. More...
class	Teuchos::ValueTypeConversionTraits< unsigned long long, float >
	Convert from float to unsigned long long. More...
class	Teuchos::ValueTypeConversionTraits< short, unsigned short >
	Convert from unsigned short to short. More...
class	Teuchos::ValueTypeConversionTraits< unsigned short, short >
	Convert from short to unsigned short. More...
class	Teuchos::ValueTypeConversionTraits< int, unsigned int >
	Convert from unsigned int to int. More...
class	Teuchos::ValueTypeConversionTraits< unsigned int, int >
	Convert from int to unsigned int. More...
class	Teuchos::ValueTypeConversionTraits< long, unsigned long >
	Convert from unsigned long to long. More...
class	Teuchos::ValueTypeConversionTraits< unsigned long, long >
	Convert from long to unsigned long. More...
class	Teuchos::ValueTypeConversionTraits< long long, unsigned long long >
	Convert from unsigned long long to long long. More...
class	Teuchos::ValueTypeConversionTraits< unsigned long long, long long >
	Convert from long long to unsigned long long. More...
class	Teuchos::ValueTypeConversionTraits< short, int >
	Convert from int to short. More...
class	Teuchos::ValueTypeConversionTraits< short, long >
	Convert from long to short. More...
class	Teuchos::ValueTypeConversionTraits< int, long >
	Convert from long to int. More...
class	Teuchos::ValueTypeConversionTraits< int, unsigned long >
	Convert from unsigned long to int. More...
class	Teuchos::ValueTypeConversionTraits< long, unsigned int >
	Convert from unsigned int to long. More...
class	Teuchos::ValueTypeConversionTraits< unsigned int, long >
	Convert from long to unsigned int. More...
class	Teuchos::ValueTypeConversionTraits< unsigned int, unsigned long >
	Convert from unsigned long to unsigned int. More...
class	Teuchos::ValueTypeConversionTraits< unsigned short, unsigned long >
	Convert from unsigned long to unsigned short. More...
class	Teuchos::ValueTypeConversionTraits< int, long long >
	Convert from long long to int. More...
class	Teuchos::ValueTypeConversionTraits< unsigned int, long long >
	Convert from long long to unsigned int. More...
class	Teuchos::ValueTypeConversionTraits< int, unsigned long long >
	Convert from unsigned long long to int. More...
class	Teuchos::ValueTypeConversionTraits< unsigned int, unsigned long long >
	Convert from unsigned long long to unsigned int. More...
class	Teuchos::ValueTypeConversionTraits< float, long long >
	Convert from long long to float. More...
class	Teuchos::ValueTypeConversionTraits< float, unsigned long long >
	Convert from unsigned long long to float. More...
class	Teuchos::ValueTypeConversionTraits< std::string, char[N]>
	Convert raw C string to std::string. More...

Namespaces
	Teuchos

Functions
template<class TypeTo , class TypeFrom >
TypeTo	Teuchos::as (const TypeFrom &t)
	Convert from one value type to another. More...
template<class TypeTo , class TypeFrom >
TypeTo	Teuchos::asSafe (const TypeFrom &t)
	Convert from one value type to another, with validity checks if appropriate. More...

Detailed Description

Definition of Teuchos::as, for conversions between types.

This header file declares Teuchos::as, which is a template function that converts between two different types. For example, the following code converts from double to int:

double d = 3.14;
int i = Teuchos::as<double> (d);
assert (i == 3);

In a debug build of Teuchos, this code would check for overflow when converting from double (64 bits) to int (32 bits, on most platforms these days), and throw an exception if overflow occurs. In a release build, this code would not check for overflow. Users who want to check for overflow may use the Teuchos::asSafe template function. This works the same way as Teuchos::as, except that it always checks for overflow.

This file includes definitions of a small number of useful conversions. If you want to define your own conversions, you should specialize the Teuchos::ValueTypeConversionTraits template class for the "to" and "from" types in your conversion. This automatically defines Teuchos::as and Teuchos::asSafe for your conversion.

Definition in file Teuchos_as.hpp.